display: inline-block; text-align: right;

 

<div class="container">  
    <div class="content">AAA</div>
    <div class="content">BBB</div>
    <div class="content">CCC</div>
</div>

.container {
  text-align: right;
  border:1px solid green;
}
.content {
  display: inline-block;
  border:1px solid red;
}